Also, for precast panels are you referring to the factory-built walls that have all of the electrical, insulation, and structural members inside already?

Hi Whitney,Talk to an attorney local to the property.You might be able to get a financial judgement (trebled).Step one might be to get three bids on (comparable) replacement systems.American Standard, Bryant, Carrier, Lennox and Trane are names of some furance and A/C (HVAC) manufactures.And realize a new furnace A/C (HVAC) might force you to change the thermostats too (or not).Trying to figure out costs on this yourself (with any resprayed insulation up there) might be pretty tough, (plus you have to buy whatever new refrigerant is required in your area--and the new stuff can be very very expensive).You might be able to pick the brand you like best, or the one fastest installed vs the cheapest...ask an attorney.Also, in a financial judgement, you have to collect...lien their wages or bank accounts (to the extent you are allowed to do so by THEIR Locality).

Energy Efficient Home Deductions (45L) – Your property may be eligible for this deduction if the property uses energy efficient assets such as windows, roofing, high R value insulation, doors or HVAC and the property is 2 stories or less and considered a residential property or apartment.3.

Mold on every surface, mold behind every wall, mold on the insulation, every metal corner bead rusted out, window sills rotted out, framing rotted, floor joist rotted, holes in the floors, no cabinet or door attached, plumbing leaks, tub cracked, rats/cockroaches, cat pee everywhere.

It could be floor tiles, ceiling tiles, wall board, insulation, hvac insulation, siding, popcorn on the ceiling, or others.

I hope someone can help with what kind of big expenses  are in the multi family properties i need to know when looking for properties(can only think of roof, deck, insulation , heating system )Also, Not sure if I jump ahead but I am trying to sort out all the related expense for rental property below with my conservative estimate per yearProperty management fee (10%)insurance :2500property taxes: 2000 -3500Owner paid utilities : 2500( in case of paying oil burning heating system , if tenant pay their own electric heat so i guess i can eliminate this expense)snow/lawn: 1200Accounting cost: 100Vacancy reserve (5%)Maintenance reserve (10%)Can anyone give the idea if i include these expenses correctly ?

I believe it only needs some minor HVAC work under the crawl space (reconnect two ducts and insulate existing ducting) and a few other touch up items that won't cost more that ~3k to fix up total. 

In most cases, here are some universal tips :buy for cashflowbuy value-add as it helps insulate risk as a newbiebuild a team in areas you are weak in or do not want to docheap multifamily will typically rent to low income tenantscheap multifamily will have bigger renovation budgetscheaper price fees and large unit count portfolio's do not equal a good property managernever assume anythingpartner upand if raising capital, raise early as @Taylor L. so equivocally mentioned.

A week later I go back up there and I still don’t see anything, but I lift up this piece of insulation and there is a bat looking straight at me with hisfangs and he’s dehydrated because he must’ve eaten some of those mouse pellets..

We are fairly well insulated against most economic cycles.